Chint DTSU666-CT
Chint DTSU666-CT is the external-CT version of the DTSU666 three-phase meter for mains above 80 A: 0.015-1.5(6) A secondary input for three /5 A current transformers, EN 50470 Class C / 0.5S, MID B+D, RS485 Modbus-RTU.
- MID B+D certified on both variants, RS485/Modbus-RTU output for EMS or inverter export-control integration.
- DTSU666 wires direct up to 0.25-5(80) A; DTSU666-CT reads via external 5 A-secondary CTs for higher-current or retrofit installs.
- Same 72 × 100 × 65 mm DIN-rail housing and -25 to +55 °C operating rating on both models.
- Manufacturer
- Chint
- Model code
- DTSU666-CT
- Item no.
- DLK-CHINT-DTSU666CT
- Delivery
- Delivery to Germany · EUR 14.90 at checkout
Plan with DTSU666-CT
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Figures transcribed from the manufacturer datasheet on file. Confirm your grid code and configuration with our engineers before ordering.
- GoodWe · SAJ · Pylontech · EcoFlow · Chint paired from the maker’s own lists
- Datasheets on file for every item
- Within 24 h engineering response
- MOQ 1 unit · EU delivery
- Engineering-checked configurations
Zero export starts with numbers that hold up.
Bidirectional metering at the grid connection point feeds the inverter the import and export truth it needs.
External CT input
Works with three /5 A current transformers on a 3P4W connection; the 0.015-1.5(6) A secondary input meters mains that direct-connection meters cannot.
Inspect it before you spec it.
Official renders, installation photos and system panels for this model line.
Manufacturer imagery from the official Chint documentation.
Manufacturer imagery from the official Chint documentation.
Specifications
Every value exactly as published in the official DTSU666-CT documentation.
Documents
Complete the system
Balance-of-system and accessories paired with this model. Every pairing follows the manufacturer's official compatibility list.
MBS KBU 58 split-core CT — pick the ratio matching site current
- [1]MBS KBU 58 split-core CT — pick the ratio matching site current
Pick the rating
Chint family. Same engineering, different size.
Every figure comes straight from the manufacturer's official datasheet.
Configuration 2
Pick by the current at the metering point: the DTSU666 meters directly up to 80 A per phase; above that, or on retrofit installs, use the DTSU666-CT with external transformers.
- DTSU666: direct connection, 0.25 to 5(80) A, Class B / 1.0 active energy.
- DTSU666-CT: reads three /5 A current transformers on a 0.015 to 1.5(6) A input, Class C / 0.5S with the CTs.
- Same housing: both are 72 x 100 x 65 mm DIN-rail units on a 3P4W connection, rated 3x220/380 to 3x240/415 V.
SAJ documents the DTSU666 as the three-phase smart meter of its zero-export solution; the meter sits at the grid connection point and reports import and export to the inverter in real time.
- Interface: RS485 with Modbus-RTU protocol.
- Bidirectional registers: import and export kWh and kvarh, plus kW, kvar, kVA, phase currents and voltages, frequency and power factor.
- Other brands: the Modbus-RTU output is the common interface; confirm your specific inverter's supported meter list with the quote.
Installation & wiring 1
Both variants clip to a 35 mm DIN rail on a 3P4W connection; the RS485 pair runs to the inverter or EMS.
- Bus settings: Modbus-RTU at 9600 bps by default, selectable 1200 to 19200 bps.
- CT wiring (CT version): three transformers with a /5 A secondary, one per phase, into the 1.5(6) A input; the CTs are not included with the meter. The MBS KBU 58 split-core family covers that interface in six ratios.
- Environment: IP20, -25 to +55 C, up to 95 percent RH non-condensing, consumption 2 W or less.
Availability & compliance 1
Both variants are MID-certified to EN 50470-1/-3 with MID modules B and D, per Chint's documentation.
- Accuracy: Class B / 1.0 active energy on the direct DTSU666; Class C / 0.5S through the CT input on the DTSU666-CT.
- Scope: MID certification applies to the meter itself; grid-code approvals for the plant sit with the inverter side.
- Project file: confirm the certificate set your network operator requires with the quote.
Operation & warranty 1
Both variants meter bidirectionally and display values locally.
- Registers: import and export kWh and kvarh; kW, kvar and kVA; RMS current and voltage per phase; frequency and power factor.
- Display: backlit LCD on the DTSU666, 7-digit 7-segment display on the DTSU666-CT, plus a pulse-output LED on both.
- CT sizing (CT version): the three transformers are sized to the incomer; 200/5 is a common rating.
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